One-Button Control,Easy to Use Answering/redialing/dismissing/ending a call or activate Siri/Google Assistant canbe done by just simply clicking a button. This function seamlessly switches between incoming calls/music and Voice Assistant.Convenientone-button control makes driving safer. Dual Ports Fast ChargingCar bluetooth transmitter equipped with USB A (QC3.0) port and USB C (PD3.0 18W) port enables you to charge 2 devices at the same time as well as offer a better charging performance.Compatible with smartphones and other USB charging devices. Clearer Hands-Free CallingHandsfree Car Kit adopts advanced high speed noise cancellation technology.With 1.05M cable, can bring the microphone is much closer to the driver for enables clearer calls. Colorful Backlit & Voltage Display You can choose a single color or 7 color mode, the light allows you to find the buttons more accurately in the dark.7 multi-coloured create a better driving atmosphere. The vehicle voltage is displayed when the FM transmitter is inserted into the car cigarette lighter and powered on. 2 Installation Options With the 1.05M cable, you can use this car radio transmitter freely in the car. The package comes with an air vent clip and a sticky seat. You can mount it on the car air vent or stick it on the dashboard.